Material datasheet · Hot-work tool steel
AISI H13 Hot-Work Tool Steel
UNS T20813 · Annealed for machining; hardened, double tempered to 44-50 HRC
Hot-work standard. Holds 44 HRC at 540°C continuous service.
Chemical composition
Nominal % by weight.
| Element | % by wt |
|---|---|
| Fe | Bal. |
| C | 0.32–0.45 |
| Cr | 5.00–5.50 |
| Mo | 1.10–1.75 |
| V | 0.80–1.20 |
Applicable specifications
AMS / ASTM / MIL.
- ASTM A681
- AMS 6408
- NADCA #207
Austenitize 1850°F, air or oil quench, double temper 1050°F.
Machining guidance
CNC parameters and tooling.
Coated carbide
Holds 44 HRC at 1000°F. Standard for aluminum die casting and hot forging dies.
Stock & cost
Forms and Q1 2026 pricing.
- Nitride (key for die life)
- PVD coatings
- Polish for plastic mold cavities
Typical applications
Where H13 Tool Steel is the right pick.
- Aluminum die casting dies
- Hot forging dies
- Plastic injection molds
- Extrusion tooling
Alternative materials
Substitute or upgrade options.
- H11 (lower carbon, tougher)
- S7 (impact)
- Premium DIEVAR / QRO 90
True Precision Machining · Buellton, CA
Machine your part in H13 Tool Steel.
5-axis CNC · ISO 9001 · AS9100 · ITAR · CMMC-compliant · DFARS-compliant supply chain. AS9102 FAI on aerospace.
Technically reviewed by the True Precision Machining engineering team · Last reviewed June 2026
Standards referenced: ASTM A681, AMS 6408, NADCA #207
Keep exploring
Related tools & references
Speeds, feeds, tooling, and chip strategy.
SFM, RPM, and feed rate for this material.
Compare alloys by strength, weight, temperature, and cost.
Estimate part weight from H13 Tool Steel stock.
Aerospace specs that call out this alloy.